Spring-motor brake.



. BONHAM.

Patented J 11110 '15, 1915.

lhvgntor Attorneys THE NORRIS PETERS 60.. PHOTO-LITHQ. WASHINGTON. D. C.

ployed by barbers, masseurs,

GUY Ii. BONI-IAM, WEST HARTFORD, CONNECTICUT.

SPRING-MOTOR BRAKE.

Specification of Letters Patent.

Patented June 15, 1915.

Original application filed April 16, 1914, Serial No. 839,849. Divided and this application filed January 18,

To all whom it may concern:

Be it known that I, GUY L. BoNHAM, citizen of the United States, residing'at Vest Hartford. in the county of Hartford and State of Connecticut, have invented a new and useful Spring-Motor Brake, of which the following is a specification.

The present invention appertains to a spring motor machine adapted to be emand others, and 1s a division of the application filed April 16, 1914, Serial No. 839,849. i

It is the object of this invention, to provide a novel thumb or finger operated brake for controlling the speed of rotation of the motor and element actuated thereby, in order that the device may be operated at various speeds, or may be stopped.

It is also within the scope of the invention, to provide a spring motor brake of comparatively simple and inexpensive construction, which will be convenient, efficient and practical in use.

lVith the foregoing and other objects in view which will appear as the description proceeds, th invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment/of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in its pre ferred embodiment in the accompanying drawings, wherein- Figure 1 is an, elevation of the machine, portions being shown in section. Fig. 2 is an enlarged cross section taken approximately on the line 2-2 of Fig. 1.

In carrying out the invention, there is provided a case or body 1 inclosing the spring motor 2, forming the subject-matter of the application above referred to, the case 1 being carried by a handle 3 engaged to the back of the case 1, while a driven. shaft 4 is journaled through the face plate of the case 1, and is adapted to carry a fan or other suitable rotatory element 5 upon its forward or protruding portion.

A plate on member 6 is secured to the inner side of the base plate of the case 1, and is provided with an angular arm or bracket 7 through which the rear or inner end of the shaft 4 is journaled, a spur gear the inner Serial No. 2,937.

8 being secured upon the shaft 4 adjacent the arm 7, and intermeshing with a gear of.

that the spring portion of the drum 9 opposite the end 11 of the brake band, and the other end of the brake band, or the extremity of the tangential portion 12, is attached or pivoted, as at 18, to the end of an inwardly projecting shank 1 1 of a button'l5. The button 15 is slidable or movable upon the periphery of the case 1, and its shank 1 1 projects through an arcuate slot 16 provided in the periphery of the case. The button 15 is preferably provided with a knob or head 15 for the engagement of the thumb or finger therewith, in order that the button may be readily slid or moved along the slot 1-6. A double or bowed leaf spring 17 is attached to end of the shank 14c and its end portions engage or bear against the interior of the case, to hold the button 15 at any position to which it is slid.

Since the shaft 1, is eccentric relative to the case, the portion of the periphery of the case having the slot 16 with which the button is cooperable, will be eccentric relative to the shaft 4, whereby the movement of the button 15 along the periphery of the case will result in the tightening and slackening of the brake band or strap 10. Thus, when the button 15 is at the position nearest the brake drum 9, as seen in Fig. 2, the brake band or strap 10 will be loosened, to enable the shaft 4 to rotate freely and at the greatest velocity, whereas if the button 15 is slid along the slot 16 away from the brake drum 9, the brake band or strap 10 will be brought to frictional contact with the drum 9, for impeding the rotation of the shaft 4. Consequently, by moving the button 15 to various positions, the frictional resistance between the brake drum and the band may be increased or decreased for varying the speed of rotation of the shaft 4, as desired, and

when the button 15 is slid sufficiently away from the brake drum 9, the brake. drum 9 and shaft 4: may be brought to a standstill, to prevent the further unwinding of the spring.

As indicated in the above identified applioation, the present machine may be employed for diverse purposes, the construction and operation of the spring motor and accompanying parts being clearly set forth in the said application. When the handle 3 is held in the hand, the thumb 'or finger may be readily applied to the button 15 for controlling the rotatory velocity of the fan or other rotatory element '5 carried by the shaft 4:, and when the machine is not in use, the button 15 may be moved properly for arresting the movement of the spring motor an driven element.

What is claimed is: 7

1. In a device of the'character described, a case, a shaft carried thereby, a bra lle drum carried by the shaft, a brake band having one end anchoredto the case and partially surrounding the drum, and a slidabl e member carried by the case, the other end of the brake band being attached to the slid'able 7 member.

2. In a device of the character described,

a case, a shaft carriedthereby,"a brake drum surrounding. the drum, the case having a slot, a button slida'ble along the case and Gopi'es of this ,patent may be obtained fior five cents eaeh, by addressiiigthe Gommissio'ner of Patents, 7

having a shank projecting through the said slot, the other end of the brake band being attached 'to the said shank, and a spring carried by the said shank and bearing against the case.

4:. In a device of the character described, a case having a slot in its periphery, a shaft journaled through one portion of the case, that portion of the periphery of the case having the slotbeing eccentric relative to the case, a brake drum carried by the {shaft within the case,a brake band partially surrounding the drum and having one end anchored Within thepase, -'and a button 'sli-dable upon the periphery of the "case and having a portion projecting Within the said slot, the

d other end of thebra'ke band being attached to the button.

-5. a device of the character described,

a case having a slot in its periphery, a shaft journaied through one portion of the case, that portion of the periphery of the case having the slot being eccentricrelative to the case, a brakerlrum carried by the shaft Within the case, a' brake band partially surrounding the drum and having one end an chored vvithin the case, a button slidable upon the periphery of the base and. having an inwardly projecting shank working Within the saldfslot, the other end of the brake ban-d being attached to the said shank, and a bowed spring secured to the said shank and having its terminal portions bearing against the interior, of the case to hold the button in place. 7

In testimony that I claim the foregoing as my mm, 1 have hereto afiixed my signature in the presence of two Witnesses. GUY L. BONE-1AM.

[Witnessesz JAMES Livnves'ron, H. C. WHITMAN.

'Washiugton; 1). =0. 

